Select the correct text in the excerpt.
Which sentence in this passage is a clear example of irrelevant and insubstantial support for an argument?
(5) Riggs disagreed with Sheldon and Browne. In his reply to Browne, Riggs declared:
(6) "I don't like the name of Denali. It is not descriptive. Everybody in the United States knows of Mt. McKinley and the various
efforts made to climb it. In consequence, both Mr. Yard and I think that the name McKinley should stick...."
(7) "Mount McKinley National Park" officially prevailed after its legislation was signed into law on February 26, 1917.
(8) It proved difficult to supplant words and meanings that endured for generations among Athabaskan groups living in close
proximity to the mountain.
